Physical Mixing Of N-Doped Graphene Quantum Dots Functionalized TiO2 For Sustainable Degradation Of Methylene Blue

3rd International Conference on Manufacturing, Material and Metallurgical Engineering

机械制造;材料科学;冶金学

Leong, Kah Hon^1 ; Yang Fong, Sean^1 ; Feng Lim, Ping^1 ; Ching Sim, Lan^1 ; Saravanan, Pichiah^2

Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Perak, Malaysia^1

Department of Environmental Science and Engineering, Indian Institute of Technology (ISM), Dhanbad, Jharkhand, India^2

关键词: Environmental remediation;    Photodegradation of methylene blue;    Physical mixing;    Strong absorptions;    Sunlight irradiation;    TiO2 nano-particles;    UV-vis spectroscopy;    Visible and near infrared;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/409/1/012009/pdf
DOI  :  10.1088/1757-899X/409/1/012009

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

An in-situ physical assisted mixing was applied for uniform incorporation of N-doped graphene quantum dots (N-GQDs) with TiO2 nanoparticles to construct N-GDQs/TiO2. The unique characteristics of N-doped graphene quantum dots enable it to act as a rich optical light harvesting. The strong absorption under the UV-Vis spectroscopy shows the efficacy in absorbing visible and Near Infrared (NIR) photon. The photocatalysis of the synthesized composite was evaluated through the efficiency of photodegradation of Methylene Blue in aqueous solution under direct sunlight irradiation. A complete degradation was achieved within 150 mins for 1.5% N-GQDs/TiO2 composite as compare to pure. The vast improvement of this photocatalysis efficiency is much attributed to the strong light absorbance in the entire solar spectrum. Hence, the formation of N-GQDs/TiO2 could be broadly used as future sustainable photocatalyst for treating various organic pollutants in the field of aquatic environmental remediation.